I got my wisdom tooth removed saturday... Only thing I've eaten in the last few days is lemon ice cream and jello...Seriously. Watching Carl Jr's ads in TV is so painful... And I dont even like burguers....

It keeps ALL the juices inside the meat. And steaming the cheese turns it into a big puffy molten globule of love. I'm telling you, it is an AMAZING burger.
Before I bought the steamer above I did a kind of homemade steamer and this worked very well:

Get 2 large tuna or chicken cans. Empty them out and wash them really well (I put mine in the dishwasher).
Put aged sharp white cheddar in one can and then press ground beef into the other.
Take a large skillet or sauce pan with a lid that fits tightly. Put enough water in it so that when the tuna cans with the meet and cheese are put in the water comes halfway up the sides of the cans.
Boil the water and then place the cans in the middle of the pan, close lid. For 1/3 lb burgers cooked medium, steam for 10 mins.
Toast bun, add lettuce, mayo and pickles then put meat on bun followed by the cheese.
ENJOY!